batch video thumbnail maker for Mac

I have searched the Internet high and low and can't find a software that will make video thumbnails (os 10.4.11 or lower PPC not Intel) and has a batch function. There is one called CocoThumbX which doesn't seem to be avialble anymore. I did a Google search, but it just shows links to Windows video thumbnail makers.

There is an app called ScreenGrabber that is available at the App Store. I have an early version, but didn't like the way it only captured a portion of the screen. Not really helpful, and 3x4 aspect as well. I would like to try the updated version, and for $3 would give it a go. However, the reviews are not that great.